PS+ Free Games On Vita Clarification

This probably applies to PS3 and PS4 too but more relevant to my Vita due to space considerations. Once I download a free PS+ title to my Vita, I can delete the game if I need space and them redownload it whenever and as many times as I want for free, even if it's no longer a PS+ free game. Right? I don't have to back it up somewhere do I? It's considered a redownloadable "purchase" even though I didn't actually have to pay for it. Of course I have to keep my PS+ subscription active to actually play it, I get that, but once downloaded it's free forever to redownload?

Yep once you have got the game on your Download list history it's there forever & can be downloaded anytime as long as you remain a PS+ member even if your sub runs out it will still be on the list but just won't be Playable till you re-new your Sub